Dynamo-electric machine.



PATENTED'AUG. 18, 1908.

- H. G. REIST. DYNAMO ELECTRIC MACHINE.

APPLICATION FILED JULY 1 0, 1903.

I noe ntor: HenryGReist,

citizen of the 'United States, I Schenectady, in. the county'of Schenectady 'and'State of New York," have invented cer To cm whom itmay concern: c

PATENT OFFICE.

I HEN-RY (EL-REIST, or SCHENECTADY,.NEWYORIQASSIGNOR ro GENERAL ELECTRIC,

COMPANY, A CORPORATION on NEW YORK.

DYNAMQ ELECTRIG MACHINE RE-I s'r, a 'residing at 1 Be -it knownthat I,- HE RY G.

tain new and useful lmprovements in Dynamo-Electric Machines, of whicli, thefollowe ing is a specification. I

More particuof'a dynamo-electri machine. 1 I 4 When dynamo-electric machines are-run prove the construction of the field linember at highspeeds, such for instance 'asi fre-' quently occur whenthey are directly con-. nected. to steam turbines, difliculties m be.

which experienced by reason of the speed at they are run] forces createdmay cause a change in 0f portions such as the'windings-and thus produce a consequent .unbalaricing ofthe machine.

My invention contemplates among other things certain features of constructionand arrangement by which avery simple and eflicient organization is produced whichwill 'stand high speeds without-injurious effects.

The various features of novelty which char Iacterize my invention will be pointed out in" forming .part of the claims annexedto and thisspecification. I

For a better understanding of my invention reference may be had to the accompanying drawin in which Ihave illustrated the rotating fie d member'of a dynamo-electric. machine embodying one form of my invention. I 7

the methodof assembling thevarious parts;

Referring to the drawings, 1 represents the shaft upon which the revolving field-member is mounted. The body or member'is formed of a. number of layersor sections 2 and 3.-

, are. formed of magnetic material such as soft Specification of Letters Patent. Application filed July 10,

. I ,'-Whicl1 the shaft-1 passesand-with The'object .of mypresent invention-is to improve the construction and. operation ofdynamo-electric machines. I larly the object of my invention is to' im Band 9 ,areof unequal extent,

- For instance; the centrifugal.

shape Of the drawings Figure 1 is a I i end eleva- I 'tion' of the rotating member-lot a dynamicelectric.machine embody1ng my invention,

artly sectioned on the line -B B of the revolving:

I These layers or sections P te-need Au 18, 1908. 190a sesame. 164,959.

consist's referably of a" bundle of laminae [Each section is substantially rectangular- I and is provided with anaperture '5gthrpugh key-ways 6 and 7' which operate in conjunction with suitable keys to 'prevent relative rotation between'the shaft and sections 2 and The aperture '5 divideseach section or layer into t-wo-parts orportions Sand 9. The portions the portion 9 'being 'the longer- Asshown, the outer end of the portion 9 is curved concentrically with the .axis' of the shaft 1*, the end'ofthe portion 8 however is straight. Inf assembling the sections 2 and-. 3on the? shaft, one set of sec-- 'tions is reversed withirespect to the other "so that the longerportions-o'f the sections 2 ext 'end in one direction while the longer portions of the section 3 extend-in the opposite direct-ion;

. -The sections .2 and-3 alternate alongthe "Asa consequence the outerends ofshaft; the longer portions of'the sections 2 are separated-by. spaces,"the thickness of aspace'beingequal to the. thickness of thesection'3andthe radial extentof the space being-equal to} the d ifierenceinthe length-of the long and short portionso f the sections 2 and Similar spaces exist between the ends .of the I longer portions 3.. In the form of my invention-which I haveillustrated in the drawing,

these spaces are filled by s'egmentally-shaped .pole tip members -l0-. Each member 10 con-, vsis'ts preferably of abundle of sheets ofmagnetic material which are shaped so as "to pro j'ect flush with the outer edges of the extending longer. portions 9 oftlle sections-2 and 3 '.but are of a length such that the ends ofthe tip member project beyond tliesides of the sections 2 and 3! I As a conseoucnce spaces 11. are formed between the ends of the pole tips which extend transversely to the pole face. reluctance atthe tips of the pole pieces, a desirable feature, as is Well unders skilled in the art. I

The-sections 2 and 3 "are ertur'es 12. f Theapertures 12' are arranged in two pairs; one pair in each endor'portic'n Iofj each section,- and are so arranged that whenithesecticiis 2 andg are assembled the This has the effect ofincrensing theood by those I provided with 5 j apertures formed in the pole tip members 10,..-

holes in the short end of one section will register with the holes in the long end of the adjacent section, andvice versa. Bolts orrivets 13 pass through these .openin s and form a means for-securing together t e sections 2 and 3 composing the body of the 'ro-- tating field member. 7

The outer ends of the extending longer portions of the sections 2 and 3' are provided with apertures 14 whichregister with similar Boltsor pins 15 pass through these apertures in a direction parallel to.the sl 1'aft-1 and'de tachably secure the pole tips 10in place Each section 2 and 3' is provided with a pa :r of similar and similarly located laterally er rtcnding wings or projections '16. These 7, wings or extensions areat one side of a line passingthrough the center of theaperturefi,

shorter end of each-section. As a result" the wings or projections being toward the when the sections 2 and 3 are-assembled the projecting wings or extensions 16 are arranged in two-sets, those carried by the sections 2 being separated bya plane passmg through the axis of the shaft 1 from those carried-by the section 3. With thisarrangemerit spaces are left between the wings or projections 16which correspond with the spaces between the projecting ends ofthe corresponding pole tip segtio,ns 10. Links or;v

' members 17v formed oi non-magnetic material, preferably each consisting of a bundle ofpunchings of phosphor bronze or the like, are placed so that one end of each link projects into the space between a pair of pole tip members. 10 and a air of "wings '16-. This construction is clear y shown in Figs. 2 and 4. Registering apertures 18 and 19 I are. formed in the ends of the links 17 and wings 16, and links 17 and projectingends of the tip 10 respectively. Bolts'or pins 20 and 21 pass through these aper'turesand secure the links 17 in place.

Preferably members 22, 23 and 24 are employed .at'each end otlthe rotating member.

The outline of the member 24; as is clearly' shown in 1, is substantially that of the combined outlines of the members 2 and 3 as they appear whenassembled; The members 22 and 23. are similar in outline to themember \24 but may differ in thickness from each other and from the member 24/111 practice the members 23 and 24 .are considerably thicker than the sections 2 and 3. Preferably these members are each corn-v posed oi bundles of similar punchings or laminae of mild steel orthe like riveted together.

I In assembling theparts, the members 2 and 3 are preferablyclamped between the members 22 by the rivets 13 which pass through aperturrs' formed for the purpose in the men in?! 0 and which terminate at the our: 2 cos oi said members a the pole ti members 10 but differing t tion 2 and 3 forms a pieces of the machine.

The members 23 and 24 are so placed that fsp'aces exist-between the members 22 and 23 and the members 23 and124 respectively for a purpose to be-hereinafterimentione Tip portions 25.. and 26 similar in sh e to erefrom in thickness are laced between the members 22 and23 an 23 and 24 respec- "tively. The members 22, 23 and 24 are formed with apertures which register with the apertures 14 and 18 in the members 2 and 3 and the boltsor pins 15 and 20 pass through these members as well as through the membersI'Z and 3. Link members17 'an-d'17" similarin general to-the links 17 eX-. "tend from each side of each end of e'a'chtip piece 25 into the space between the lateral extensions of the members 22 and 23. 'As'is clearly shown in the-drawings, these link's' are bent-in the direction of their length in The projecting ends of the tips 10, the links 17, and the extensions or' wings 16 in the bodies of the sections 2 and 3, form four coil-receiving-spaces." When-the parts are shaped as shown in the drawings these coilreceivmg spacesare rectangular and recelve coils 29 and 30 which serve to create a mag-f netic fiux giving the longer ends of thesec tions 2 one polarity and the-longer ends" of the sections -3 the opposite polarity. It will be observed in. thisconnection that/each sec- The coils 29 and 30 are; similar'in con struction and each consists of two sections '2929, and 30 30 respectively. The sections 29 and 30 surround the sections 29 and; 30 respectively. Theend of. the coil "sections 29 and 30 are placed between the membersv 22 and 23 and the ends of the coil sections 2-9" and 30 are placed between the members 23 and 24, thespaces between the members22 and 23 and 23 and- 24 respectively being just suificient'for the purpose.

The 'coilsare divided in order to allow of a readier formation and manipul'ation of them;

With the arrangement described the whole construction is made symmetrical. The coilsare prevented from'moving radially of? of the polepieces by the pole tip members 10 and the members 25 and 26. The and turns or connections of the coils or windings part ofthe two pole CII scenes 1 are firmly locked in place they cannot be thrown out of position by the centrifugal forces generated and thereby produce an unbalancing of the mechanism. The spaces between the links'17 and wings are sufficient to insure a proper ventilation of the coils.

The construction employed allows a ready removal of the coils whenever it may become desirable. All that is necessary is to remove the pole tip members 10 and spread the retaining members 17. This necessitates merely the withdrawal of the pins 15 and 20. While I have described the best form of my invention now known to me, it will readily be understood that modifications in the form of the invention described can be made with out departing from its spirit.

What I claim as new and desire to secure by Letters Patent of the United States, is,

1.- In a dynamo-electric machine, a pole piece having spaces formed in its tips extending transversely to the face of the pole piece, a coil surrounding said pole piece and nonma etic coil-retaining members entering sai spaces and engaging the periphery of said coil. i 2. In a field magnet, a laminated pole piece having removable tips, a coil surrounding said pole piece, and a retaining member or members therefor engaging the periphery of said coil and mounted upon-said pole tips to hold said coil in place against centrifugal taining members connected to pole mem bers and to sections.

5. A field magnet having its pole pieces formed of alternately placed long and short portions, pole tip members placed between the long portions, and coil-retaining members entering the space between the ends of the pole tip members. I

'6. In a field magnet, a laminated pole piece, a coil surrounding said pole piece, and

a plurality of parallel coil retaining members engaging the periphery of said coil and connected to the pole piece to hold said coil in place against centrifugal force.

7. In a field magnet, a laminated pole piece, a coilsu-rrounding said pole piece, and a coil retaining member or members therefor entering spaces formed for the purpose in the pole piece at each side of the coil, said coil retaining member engaging the periphery of said coil to hold it in place against centrifugal force.

8. Afield magnet having its poles made up of long portions and short-portions, said short portions being provided with wings, projecting pole tip members located between the long portions, and coil-retaining members en'tering the spaces between adjacent rings and between adjacent pole tip memers.

9. A field magnet made up of similar sections, each section having a short polaf'portion and a long polar portion, said sections being assembled so that the long portions in each pole-are separated by short portions, pole tip members located between the long portions, and coil retaining members entering the spaces between said pole tip memers.

10. In combination, a pole piece compris ing a body portion and pole tip members, and coil-retaining members, said coil-retaining members being connected at one of their ends to the pole tip member and at the other of their ends'to the body of the polepiece.

11. In a field magnet, a pole piecehaving coil receiving channels, and a magnetizing coil therefor formed in sections, one of said sections surrounding the other, said sections being separated at their ends by a portion of .the pole piece and being together in the coil recelving channels.

12. In a field ma net, a laminated pole piece comprising (poI ody portion, sai body portion and pole tip members forming a coil receiving chame tip members and a her, a coil surrounding said pole piece, and a coil retaining member or members connected to said pole .tip members and said body portion and engaging the periphery of the coil to hold it in place against centrifugal force.

13. In a dynamo-electric'ma chine, a pole piece formed 'of laminae, spaces between some of the laminae, a coil surrounding said pole piece and one or more non-magnetic coil-retaining members entering said spaces and engaging. the periphery of said 0011.

14. In a dynamo -electric machine, pole pieces comprising body portions and tip members, coil-retaining members, and means for detachably connecting the tip members to thebody portion and to the coil-retaining members.

15. Ina dynamo-electricmachine, a laminated pole piece and laminated non-magnetic coil-retaining memberathe laminae of &

the pole piece and the laminae of the coil-retaining members being connected together.

16. In a dynamo-electric machine, a pole piece composed of laminae, a coil surrounding the pole piece, and coil retaining members extending substantially parallel -to the axis of said pole piece, secured to said pole piece at their ends and enga ing the periphery of said coil to hold it in p ace against centrifugal force.

17. In a field magnet, a mass of magnetic material having a coil-receiving groove or channel formed in it, a coil or coils located in said groove or channel, and laminae of nonmagnetic material cooperating with the magnetic material to form a closed metallic circuit about the coil.

18. In a field magnet, a laminated pole piece formed of bundles of laminae, a coil surrounding said pole piece, andaplurality of coil retaining members engaging the outside of the coil and having their ends secured between alternate bundles of laminae which go to makeu the ole piece.

19. n a eld magnet, a laminated pole piece formed of bundles of laminae and havmg pole tip members and projecting Wings, said pole tips and wings having spaces formed therein, a coil surrounding said pole piece, and a plurality of coil retaining members engaging the outside of the coil andhaving their ends secured in said spaces.

In Witness whereof, I have hereunto set my hand this 6th day of July, 1903/ HENRY G. REIST.

Witnesses:

BENJAMIN B. HULL, HELEN ORFORD. 

